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Investments - Gains (Losses) Due To Changes In Fair Value Of Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Fixed maturity securities
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Total gains (losses)	$ 6,566	$ 62,833	$ (260,223)
Equity securities
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Total gains (losses)	8,352	45,046	(185,694)
Short-term investments
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Total gains (losses)	909	107	88
Investments
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Total gains (losses)	$ 15,827	$ 107,986	$ (445,829)

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- Definition

For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

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